Liam Hemsworth has reportedly been cheating on his fiancé Miley Cyrus. According to a report by US Weekly, Hemsworth has been sexting "Mad Men" actress January Jones. 

"I want to [expletive] you," read one of the messages.

However, according to E! News, the rumors that Hemsworth is sending Jones raunchy text messages is completely not true.

"The story of Liam Hemsworth and January Jones is entirely fabricated by US weekly. There is no truth whatsoever to this tabloid fiction," his rep told E! News in a statement.

The couple, who have been together since 2009, have been reportedly going through a very difficult time. Every week there are rumors that Cyrus and Hemsworth are on the verge of splitting. This latest rumor won't do anything to help their damaged romance especially since Hemsworth has been linked to the actress in the past.

Earlier in the year it was rumored that the "Hunger Games" actor was fooling around with Jones. According to reports, they were spotted leaving a Grey Goose pre-Oscar party at the Chateau Marmont and heading to another private party event, Life & Style magazine reports.

There several witnesses saw the couple locking lips.

"They went to a private house party, and right in the middle of the party, January was clinging to Liam, saying 'You're so handsome,'" a source told the magazine. "He kept saying, 'We can't do this here.' Then they left holding hands and went out in a hallway and were making out. She was wasted. It wasn't good."

Despite rumors that Cyrus and Hemsworth are getting ready to call off their engagement, neither one has publicly ended the relationship.

"Liam and Miley haven't officially split, but it's over. It's just that neither wants to pull the trigger," a source the magazine.

It was reported that Cyrus' recent VMA performance with Robin Thicke left Hemsworth mortified and embarrassed. She raised several eyebrows for her VMA performance. The young singer was seen twerking, gyrating and making lewd gestures with a giant foam hand.  

"Liam really does care about Miley, but her racy new look and sorta ghetto attitude isn't exactly what he signed up for," a source told Radar Online. "Her VMA performance absolutely mortified him and he couldn't be more embarrassed. He doesn't really see anything sexy about what she did on stage."